The full capital, roman or italic, is larger than the other letters of the font, every letter being as high as the lower-case ascenders.

The small capital is only as high as the lower-case round letters.

Larger capitals still are sometimes used as chapter initials and the like.
It will be observed that the distinction between capital and lower-case letters is one of form, not of size.

The full capitals being much more used than the small capitals and being larger than the other letters in the font, the impression is common that the size is the distinguishing mark.

This erroneous impression has even crept into dictionary definitions.
The full capital, which will hereafter be called in this book simply the capital, is used in combination with lower-case letters or with small capitals in the same word.